Bruising and a Seizure in a Baby Boy - Immunology clinical simulation case. A 9-month-old previously healthy infant boy brought by his mother after a...
Age: 9 • Gender: Male • Setting: Emergency Triage
Clinical Presentation & History
A 9-month-old previously healthy infant boy brought by his mother after a witnessed first generalized tonic-clonic seizure lasting approximately 4 minutes, now post-ictal. Mother also notes new widespread petechiae and scattered ecchymoses over the trunk and extremities that appeared over the past 48 hours, plus an upper respiratory infection last week.
Acute Resuscitation Milestones & Priorities
Clinical phases and key interventions encountered in this emergency module:
Initial Triage & Post-Ictal Assessment
Identifying Severe Thrombocytopenia & Coagulation Profile
Severe thrombocytopenia (<10,000) with NORMAL coagulation in a bleeding child should trigger a careful peripheral smear review. Small platelets (low MPV) are not ITP; they point to Wiskott-Aldrich syndrome or other inherited thrombocytopenias.
Wiskott-Aldrich syndrome classically presents with the triad of MICROTHROMBOCYTOPENIA (small platelets), eczema, and recurrent infections in boys—it is X-linked and frequently misdiagnosed as ITP.
Active intracranial hemorrhage with severe thrombocytopenia requires immediate hemostatic support (platelets, IVIG, steroids) and early neurosurgical consultation; do not delay platelet transfusion for alloimmunization concerns in life-threatening bleeding.
Definitive cure for Wiskott-Aldrich syndrome is allogeneic hematopoietic stem cell transplantation, ideally before age 5 and before severe complications develop.
Splenectomy is contraindicated in Wiskott-Aldrich syndrome before HSCT due to catastrophic post-splenectomy sepsis risk and worse transplant outcomes.
Test Your Clinical Reasoning in Real Time
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